<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../lib/vue-2.6.12.js"></script>
</head>
<body>
    
    <div id="app">
       <input type="text" v-model.number="n1"> +
        <input type="text" v-model.number="n2"> =
        <span>{{ n1 +  n2 }}</span>
    </div>

    <script>

        const vm = new Vue({
            el:'#app',
            data: {
                n1: 1,
                n2: 2
            },
            methods: {

            }
        })
    </script>
</body>
</html>
